I'm ancient. I go back to the (surveilled btw) vietnam demos. '69 or so.

Yes. Nuclear weapons...I don't recall fear of nuclear power (e.g.) except by some general association with weapons.
I don't recall anything specifically about PZ as a nuclear weapons prolification activist except the general statement that everyone was opposed to it. I would think I would have heard (and remember!) if he was unusually activist in that area tho.